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activator

noun C2
  1. One who, or that which, activates.
  2. Something that activates a catalyst
  3. Any chemical or agent which regulates one or more genes by increasing the rate of transcription.
  4. A type of effector that increases the rate of enzyme-mediated reactions.
  5. A type of dopant used in phosphors and scintillators.
  6. An agent that enables the flotation of a mineral or minerals.
  7. A hand-held device that delivers a controlled fast thrust to a joint, muscle, etc., to help stimulate nervous system activity.

Plural activators

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Words, meanings, pronunciations and translations from Wiktionary (CC BY-SA 4.0); how common each word is from wordfreq. Made into this dictionary by FluentPlex.